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<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta http-equiv="X-UA-Compatible" content="IE=edge">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>正则表达式</title>
</head>
<body>
    <script>

        let str = '{ "commentId": 362, "articleId": 1, "userId": 1, "status": 0, "likes": 0, "replies": 0, "content": "嘻嘻", "createTime": "2021-11-01 13:51:05" }'
        let reg = 
        console.log(str.match(/"content": "(.*?)"/)[1]);
    </script>
</body>
</html>